Optical and Near-Infrared Photometry of the Type Ia Supernova 2000E in NGC 6951
Optical and Near-Infrared Photometry of the Type Ia Supernova 2000E in NGC 6951
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DOI：
10.1086/377448
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发表时间：
2003-06
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影响因子：
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通讯作者：
G. Valentini;E. Di Carlo;F. Massi;M. Dolci;A. Arkharov;V. Larionov;A. Pastorello;A. Di Paola;S. Benetti;E. Cappellaro;M. Turatto;F. Pedichini;F. D'Alessio;A. Caratti o Garatti;G. Li Causi;R. Speziali;I. J. Danziger;A. Tornambe'
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作者：
G. Valentini;E. Di Carlo;F. Massi;M. Dolci;A. Arkharov;V. Larionov;A. Pastorello;A. Di Paola;S. Benetti;E. Cappellaro;M. Turatto;F. Pedichini;F. D'Alessio;A. Caratti o Garatti;G. Li Causi;R. Speziali;I. J. Danziger;A. Tornambe'
本文介绍了螺旋星系NGC 6951中Ia型超新星SN 2000 E的光学（UBVRI）和近红外（JHK）测光，沿着光谱。它是由泰拉莫天文台的工作人员在监测SN 1999 el时发现的。观测的时间间隔在光学上为234天，在近红外上为134天（分别在最大B光之前约16天和约7天开始）。光谱可从最大B光之前6天到之后122天获得。SN 2000 E的光度学行为与SN 1991 T和SN 1992 bc非常相似：其显示Δm15（B）= 0.94 mag，因此被归类为缓慢衰减的Ia型超新星（SN）并在可见光和近红外线中显示出这类物体的独特特征。在光谱上，SN 2000 E与SN 1990 N一样，是一个“正常”的Ia型SN。我们可以使用许多不同的方法来限制红化[E（B-V）~ 0.5 mag]和距离（μ0 ~ 32.14 mag）。SN 2000 E的热光度曲线在次级近红外峰出现时显示出一个凸起，可以确定56 Ni的质量，相当于0.9 M。
We present optical (UBVRI) and near-infrared (JHK) photometry, along with optical spectra, of the Type Ia supernova SN 2000E in the spiral galaxy NGC 6951. It was discovered by the staff of the Teramo Observatory during the monitoring of the SN 1999el. The observations span a time interval of 234 days in the optical and 134 days in the near-infrared (starting ~16 and ~7 days before maximum B light, respectively). Optical spectra are available from 6 days before maximum B light to 122 days after it. The photometric behavior of SN 2000E is remarkably similar to that of SN 1991T and SN 1992bc: it exhibits a Δm15(B) = 0.94 mag, thus being classifiable as a slow-declining Type Ia supernova (SN) and showing the distinctive features of such a class of objects both in the visible and in the near-infrared. Spectroscopically, SN 2000E appears as a "normal" Type Ia SN, like SN 1990N. We could constrain reddening [E(B-V) ~ 0.5 mag] and distance (μ0 ~ 32.14 mag) using a number of different methods. The bolometric luminosity curve of SN 2000E, which displays a bump at the epoch of the secondary near-infrared peak, allows a determination of the 56Ni mass, amounting to 0.9 M☉.